I had no idea what I was getting myself into, I just knew I needed a good "compiler" to make "programs". Apple's IDE (MPW?) was really horrendous by comparison - I was unable to get anywhere with it.
I also literally learned how to write C in CodeWarrior. I wish I could find the CodeWarrior people and tell them how influential it was.
I remember sitting there trying to decide if we should try to figure out this weird C stuff or Pascal first. We ended up going with C. Probably a good choice, in retrospect.
It's hard to tell how much of it's "first love" nostalgia, but I remember codewarrior as being very simple, very fast, and very well designed.
Visual Studio and autotools were both quite a shock. (I still can't believe people use the autotools shit-chain. Ungodly terrible.)
No one cared about GNU until they started selling the SDKs
https://www.google.com/search?q=metrowerks+codewarrior+t-shi...
Spending my nights and weekend (as a high school student in 1992-1996) in my grandparents basement, other kids out playing, I learned pascal, c++, mpw on a Mac SE30, then an LC III.
Fun Fact: I worked an entire Summer to save the $400 that was needed for Metrowerks Codewarrior. To find out that I could have gotten it for $99 academic pricing. To bad I did not know it existed. Mac Mall magazine never mentioned academic pricing! I still have this box set and can't bring myself to throw it out.